--- /dev/null
+/*=============================================================================
+//
+// board_diag.c
+//
+// HAL diagnostic output code
+//
+//=============================================================================
+//####ECOSGPLCOPYRIGHTBEGIN####
+// -------------------------------------------
+// This file is part of eCos, the Embedded Configurable Operating System.
+// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
+//
+// eCos is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 2 or (at your option) any later version.
+//
+// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with eCos; if not, write to the Free Software Foundation, Inc.,
+// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+//
+// As a special exception, if other files instantiate templates or use macros
+// or inline functions from this file, or you compile this file and link it
+// with other works to produce a work based on this file, this file does not
+// by itself cause the resulting work to be covered by the GNU General Public
+// License. However the source code for this file must still be made available
+// in accordance with section (3) of the GNU General Public License.
+//
+// This exception does not invalidate any other reasons why a work based on
+// this file might be covered by the GNU General Public License.
+//
+// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
+// at http://sources.redhat.com/ecos/ecos-license/
+// -------------------------------------------
+//####ECOSGPLCOPYRIGHTEND####
+//===========================================================================*/
+
+#include <pkgconf/hal.h>
+
+#include <cyg/infra/cyg_type.h> // base types
+#include <cyg/infra/cyg_trac.h> // tracing macros
+#include <cyg/infra/cyg_ass.h> // assertion macros
+
+#include <cyg/hal/hal_arch.h> // basic machine info
+#include <cyg/hal/hal_intr.h> // interrupt macros
+#include <cyg/hal/hal_io.h> // IO macros
+#include <cyg/hal/hal_diag.h>
+#include <cyg/hal/hal_if.h> // Calling-if API
+#include <cyg/hal/drv_api.h> // driver API
+#include <cyg/hal/hal_misc.h> // Helper functions
+#include <cyg/hal/hal_soc.h> // Hardware definitions
+#include <cyg/hal/karo_tx25.h> // Platform specifics
+
+extern void cyg_hal_plf_serial_init(void);
+
+void cyg_hal_plf_comms_init(void)
+{
+ static int initialized = 0;
+
+ if (initialized) {
+ return;
+ }
+ initialized = 1;
+ cyg_hal_plf_serial_init();
+}
+
+//-----------------------------------------------------------------------------
+// Based on 3.6864 MHz xtal
+#if CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL_BAUD==9600
+#define CYG_DEV_SERIAL_BAUD_MSB 0x00
+#define CYG_DEV_SERIAL_BAUD_LSB 0x18
+#endif
+#if CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL_BAUD==19200
+#define CYG_DEV_SERIAL_BAUD_MSB 0x00
+#define CYG_DEV_SERIAL_BAUD_LSB 0x0C
+#endif
+#if CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL_BAUD==38400
+#define CYG_DEV_SERIAL_BAUD_MSB 0x00
+#define CYG_DEV_SERIAL_BAUD_LSB 0x06
+#endif
+#if CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL_BAUD==57600
+#define CYG_DEV_SERIAL_BAUD_MSB 0x00
+#define CYG_DEV_SERIAL_BAUD_LSB 0x04
+#endif
+#if CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL_BAUD==115200
+#define CYG_DEV_SERIAL_BAUD_MSB 0x00
+#define CYG_DEV_SERIAL_BAUD_LSB 0x02
+#endif
+
+#ifndef CYG_DEV_SERIAL_BAUD_MSB
+#error Missing/incorrect serial baud rate defined - CDL error?
+#endif
+
+//-----------------------------------------------------------------------------
+// Define the serial registers. The board is equipped with a 16552
+// serial chip.
+
+#if defined (EXT_UART_x16)
+#define HAL_WRITE_UINT_UART HAL_WRITE_UINT16
+#define HAL_READ_UINT_UART HAL_READ_UINT16
+typedef cyg_uint16 uart_width;
+#elif defined (EXT_UART_x32)
+#define HAL_WRITE_UINT_UART HAL_WRITE_UINT32
+#define HAL_READ_UINT_UART HAL_READ_UINT32
+typedef cyg_uint32 uart_width;
+#else //_x8
+#define HAL_WRITE_UINT_UART HAL_WRITE_UINT8
+#define HAL_READ_UINT_UART HAL_READ_UINT8
+typedef cyg_uint8 uart_width;
+#endif
+
+#define CYG_DEV_SERIAL_RHR 0x00 // receiver buffer register, read, dlab = 0
+#define CYG_DEV_SERIAL_THR 0x00 // transmitter holding register, write, dlab = 0
+#define CYG_DEV_SERIAL_DLL 0x00 // divisor latch (LS), read/write, dlab = 1
+#define CYG_DEV_SERIAL_IER 0x01 // interrupt enable register, read/write, dlab = 0
+#define CYG_DEV_SERIAL_DLM 0x01 // divisor latch (MS), read/write, dlab = 1
+#define CYG_DEV_SERIAL_IIR 0x02 // interrupt identification register, read, dlab = 0
+#define CYG_DEV_SERIAL_FCR 0x02 // fifo control register, write, dlab = 0
+#define CYG_DEV_SERIAL_AFR 0x02 // alternate function register, read/write, dlab = 1
+#define CYG_DEV_SERIAL_LCR 0x03 // line control register, read/write
+#define CYG_DEV_SERIAL_MCR 0x04
+#define CYG_DEV_SERIAL_MCR_A 0x04
+#define CYG_DEV_SERIAL_MCR_B 0x04
+#define CYG_DEV_SERIAL_LSR 0x05 // line status register, read
+#define CYG_DEV_SERIAL_MSR 0x06 // modem status register, read
+#define CYG_DEV_SERIAL_SCR 0x07 // scratch pad register
+
+// The interrupt enable register bits.
+#define SIO_IER_ERDAI 0x01 // enable received data available irq
+#define SIO_IER_ETHREI 0x02 // enable THR empty interrupt
+#define SIO_IER_ELSI 0x04 // enable receiver line status irq
+#define SIO_IER_EMSI 0x08 // enable modem status interrupt
+
+// The interrupt identification register bits.
+#define SIO_IIR_IP 0x01 // 0 if interrupt pending
+#define SIO_IIR_ID_MASK 0x0e // mask for interrupt ID bits
+#define ISR_Tx 0x02
+#define ISR_Rx 0x04
+
+// The line status register bits.
+#define SIO_LSR_DR 0x01 // data ready
+#define SIO_LSR_OE 0x02 // overrun error
+#define SIO_LSR_PE 0x04 // parity error
+#define SIO_LSR_FE 0x08 // framing error
+#define SIO_LSR_BI 0x10 // break interrupt
+#define SIO_LSR_THRE 0x20 // transmitter holding register empty
+#define SIO_LSR_TEMT 0x40 // transmitter register empty
+#define SIO_LSR_ERR 0x80 // any error condition
+
+// The modem status register bits.
+#define SIO_MSR_DCTS 0x01 // delta clear to send
+#define SIO_MSR_DDSR 0x02 // delta data set ready
+#define SIO_MSR_TERI 0x04 // trailing edge ring indicator
+#define SIO_MSR_DDCD 0x08 // delta data carrier detect
+#define SIO_MSR_CTS 0x10 // clear to send
+#define SIO_MSR_DSR 0x20 // data set ready
+#define SIO_MSR_RI 0x40 // ring indicator
+#define SIO_MSR_DCD 0x80 // data carrier detect
+
+// The line control register bits.
+#define SIO_LCR_WLS0 0x01 // word length select bit 0
+#define SIO_LCR_WLS1 0x02 // word length select bit 1
+#define SIO_LCR_STB 0x04 // number of stop bits
+#define SIO_LCR_PEN 0x08 // parity enable
+#define SIO_LCR_EPS 0x10 // even parity select
+#define SIO_LCR_SP 0x20 // stick parity
+#define SIO_LCR_SB 0x40 // set break
+#define SIO_LCR_DLAB 0x80 // divisor latch access bit
+
+// The FIFO control register
+#define SIO_FCR_FCR0 0x01 // enable xmit and rcvr fifos
+#define SIO_FCR_FCR1 0x02 // clear RCVR FIFO
+#define SIO_FCR_FCR2 0x04 // clear XMIT FIFO
+
+//-----------------------------------------------------------------------------
+
+//#define x_debug_uart_log_buf
+#ifdef x_debug_uart_log_buf
+#define x_DIAG_BUFSIZE 2048
+static char __x_log_buf[x_DIAG_BUFSIZE];
+static int x_diag_bp = 0;
+#endif
+
+//=============================================================================
+// Compatibility with older stubs
+//=============================================================================
+
+#ifndef CYGSEM_HAL_VIRTUAL_VECTOR_DIAG
+
+#include <cyg/hal/hal_stub.h> // cyg_hal_gdb_interrupt
+
+#ifdef __BASE
+
+#ifdef CYGSEM_HAL_ROM_MONITOR
+#define CYG_HAL_STARTUP_ROM
+#define CYG_HAL_STARTUP_ROMRAM
+#undef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
+#endif
+
+#if (defined(CYG_HAL_STARTUP_ROM) || defined(CYG_HAL_STARTUP_ROMRAM)) && !defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
+#define HAL_DIAG_USES_HARDWARE
+#elif !defined(CYGDBG_HAL_DIAG_TO_DEBUG_CHAN)
+#define HAL_DIAG_USES_HARDWARE
+#elif CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL != CYGNUM_HAL_VIRTUAL_VECTOR_DEBUG_CHANNEL
+#define HAL_DIAG_USES_HARDWARE
+#endif
+
+static channel_data_t channel = {
+ (uart_width*) _BASE, 0, 0
+};
+
+#ifdef HAL_DIAG_USES_HARDWARE
+
+void hal_diag_init(void)
+{
+ static int init = 0;
+ char *msg = "\n\rARM eCos\n\r";
+ uart_width lcr;
+
+ if (init++) return;
+
+ init_duart_channel(&channel);
+
+ while (*msg) hal_diag_write_char(*msg++);
+}
+
+#ifdef DEBUG_DIAG
+#if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
+#define DIAG_BUFSIZE 32
+#else
+#define DIAG_BUFSIZE 2048
+#endif
+static char diag_buffer[DIAG_BUFSIZE];
+static int diag_bp = 0;
+#endif
+
+void hal_diag_write_char(char c)
+{
+ uart_width lsr;
+
+ hal_diag_init();
+
+ cyg_hal_plf_duart_putc(&channel, c)
+
+#ifdef DEBUG_DIAG
+ diag_buffer[diag_bp++] = c;
+ if (diag_bp == DIAG_BUFSIZE) {
+ while (1) ;
+ diag_bp = 0;
+ }
+#endif
+}
+
+void hal_diag_read_char(char *c)
+{
+ *c = cyg_hal_plf_duart_getc(&channel);
+}
+
+#else // HAL_DIAG relies on GDB
+
+// Initialize diag port - assume GDB channel is already set up
+void hal_diag_init(void)
+{
+ if (0) init_duart_channel(&channel); // avoid warning
+}
+
+// Actually send character down the wire
+static void hal_diag_write_char_serial(char c)
+{
+ cyg_hal_plf_duart_putc(&channel, c);
+}
+
+static bool hal_diag_read_serial(char *c)
+{
+ long timeout = 1000000000; // A long time...
+
+ while (!cyg_hal_plf_duart_getc_nonblock(&channel, c))
+ if (0 == --timeout) return false;
+
+ return true;
+}
+
+void hal_diag_read_char(char *c)
+{
+ while (!hal_diag_read_serial(c)) ;
+}
+
+void hal_diag_write_char(char c)
+{
+ static char line[100];
+ static int pos = 0;
+
+ // No need to send CRs
+ if (c == '\r') return;
+
+ line[pos++] = c;
+
+ if (c == '\n' || pos == sizeof(line)) {
+ CYG_INTERRUPT_STATE old;
+
+ // Disable interrupts. This prevents GDB trying to interrupt us
+ // while we are in the middle of sending a packet. The serial
+ // receive interrupt will be seen when we re-enable interrupts
+ // later.
+
+#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
+ CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION(old);
+#else
+ HAL_DISABLE_INTERRUPTS(old);
+#endif
+
+ while (1) {
+ static char hex[] = "0123456789ABCDEF";
+ cyg_uint8 csum = 0;
+ int i;
+ char c1;
+
+ hal_diag_write_char_serial('$');
+ hal_diag_write_char_serial('O');
+ csum += 'O';
+ for (i = 0; i < pos; i++) {
+ char ch = line[i];
+ char h = hex[(ch>>4)&0xF];
+ char l = hex[ch&0xF];
+ hal_diag_write_char_serial(h);
+ hal_diag_write_char_serial(l);
+ csum += h;
+ csum += l;
+ }
+ hal_diag_write_char_serial('#');
+ hal_diag_write_char_serial(hex[(csum>>4)&0xF]);
+ hal_diag_write_char_serial(hex[csum&0xF]);
+
+ // Wait for the ACK character '+' from GDB here and handle
+ // receiving a ^C instead. This is the reason for this clause
+ // being a loop.
+ if (!hal_diag_read_serial(&c1))
+ continue; // No response - try sending packet again
+
+ if ( c1 == '+' )
+ break; // a good acknowledge
+
+#ifdef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
+ cyg_drv_interrupt_acknowledge(CYG_DEV_SERIAL_INT);
+ if ( c1 == 3 ) {
+ // Ctrl-C: breakpoint.
+ cyg_hal_gdb_interrupt (__builtin_return_address(0));
+ break;
+ }
+#endif
+ // otherwise, loop round again
+ }
+
+ pos = 0;
+
+ // And re-enable interrupts
+#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
+ CYG_HAL_GDB_LEAVE_CRITICAL_IO_REGION(old);
+#else
+ HAL_RESTORE_INTERRUPTS(old);
+#endif
+
+ }
+}
+#endif
+
+#endif // __BASE
+
+#endif // CYGSEM_HAL_VIRTUAL_VECTOR_DIAG
+
+/*---------------------------------------------------------------------------*/
projects / karo-tx-redboot.git / blobdiff